88888889

Appears in sequences

• a(0)=1, a(n) = a(n-1) + 8*10^(n-1).at n=8A059482
• Main diagonal of number array A083064.at n=8A083069
• a(n) = (n*10^n - n + 9)/9.at n=8A091693
• Near-repdigit semiprimes with 8 as repeated digit.at n=23A105989
• Numbers k such that the concatenation of 8*k with k gives a square.at n=9A115551
• Expansion of (1 + 4*x - 6*x^2) / ((1 - x) * (1 - 10*x^2)).at n=16A328333